Pile-wire knife



May 4 1926. 1,583,477.

D. E. LOCHMAN PILE WIRE KNIFE Filed August 18 1925 Inward/3'0? flea/2 1 1 1L003, man,

' dent of, Belmont, in the: county of l diddle Patented May 4, 1925. I I it DEAN E. Locrrivraiv, or VBELMONT;MASSACHUSETTS, ,ASSIGATOB, TOHBLUEQTIP PIL WIRE a K IF coivir inv or ranroian.nassacrins i rrs, A coitronarrio v or I MASSACHUSETTS.

IEILE-WIRE K ma:

Application fiied August 18, 1925. seria nq saees,

To all whom it may concern: Be it known that I, DEAN.E. Looi-rMaN,

a citizen of the United States, and a resisex and State of life-seachusetts, have in vented an i Improvementin Pile-Hrs Knives, of which the followingdescription, in con' nection with the accompanying drawings, is a specification, like. characters on the drawings representing like parts.

This invention relates to a pilew1re knife having novel means providing for. the use of blades of. uniform sizein connection with pile wires of variouswidths for d fferent c'lassesof work. 7

-The invention will be best understood by reference-to the following description when taken in connection with the accompanying drawings ofone specific embodiment thereof while its scopewill be more particularly pointed; out in the appended claims. 1 1

In the drawings:' p Fig. 1 isanelevation :of' a pile-wireknife exemplifying theinvention; Fig. 2 .is an elevation of the same as I viewed from the opposite. side thereof;

Fig. 3 is .an elevation partly in section illustrating the mode of attaching andd f taching the blade;

, QFig. dis anelevation" of the filler is used as an adapter to adapt the blade to I the pilewire;

Fig. 5 is asectional view on line,s55 of Fig. 1; r Fig. 6 is a sectionalv iew on line 66 of Fig. 1; and N Fig. 7 is a sectionalviewon line 77 of Fig. 3.

- wide end 11.

Referring to the drawings and to the embodiment of the invention which is selected forexemplification, there is shown a'pilewire knife comprising a blade 8 and ablade holder 9. Herein the blade has a-tapered formation, it having a narrow endlO and The blade is provided with a cutting edge 12. d

The blade holder herein is conveniently formed .of sheet metal folded upon itself to provide two walls 13 and 14: between which is a groove 15 to receive the blade. Herein the wall 14 presents a head 16 which is wider thanthe shank of the holder and this head has a suitably shaped tip or point 1;, als1 is usual with'pile wires. The rear end 0 t e blade herein is narrower than the shank of the holder and is completely noncealed by I for the reception of the blade; The rear end of the bladeis retainedin the grooveb'y an abutment 18 which ove hangs a portion of the blade in such manner that .reinov'all of the latter from tsnornial position reprej se ited inFigs. and 2 can be accomplished only by; swinging, the-blade I as a fulcrum (see Fig; Inasmuchlas the fulcrum isat thejrear end'of the bladethfis on the abutment the walls whichp 'esent the groove construction be employed connection v with much narrower wires thanthat herein shown. In any case the head attheforward end can be made sufliciently w de. to carry meansto retainthe forwardend of the'blade inthe groove in described...

the 1113111161 5 presently to be T In the presei t example the abutment 18f presentedbya strip of metall9 constituting a. filler, which is linserted in the groove 15 between the inner edge [of thefblade and the I;

bottom of thegroove. Y The fillers iis'edwill vary in width in accordance with the various widths of thepile wires, that which is used in a given case being such'that the .c ittingv edge .of, "he blade will-be presented in the correct relationship with th e's'hank ofv the the head,'also .in all cases wire [and with I I the forward: end ofthe blade is correctly related to the positioning and retaining be described. The use of means. presentedto the filler therefore makes it unnecessary for themanufacturer or g the user to] carry in stock blades of various tliniehsion'sjfbiiuse in connection with pile wires of various widths. This results in a great saving as well as in an increased convenience to the.

manufactureras Well. as to the'user.

The filler may be fitted so snugly between the walls which embrace it that friction alone may berelied upon to hold-the filler I in place. If desired, however, the rear end of the filler may be secured in place between the walls, as by forming one vor more shallow indentations insection in Fig. 7 in one of the side walls of the holder, thereby squeezingsuch wall slightly into the adjacent surface of the filler which is interposed between the walls.-

It will be remembered that the blade holder is formed of sheet metal folded upon'itself. In practice the'holder thus formed is usually secured, as by electrically welding the same, to a flat, wire 2101? great length. In this 20 one of which is shown the art to require description.

case the welded joint occurs along a line A-A adjacent the rear end of'the filler and the latter can be conveniently secured to the holder as well as to the butt end of the wire in the welding operation in which case the indentation or indentations 20' may be omitted;

The forward end of the blade isretained in the groove by the cooperative action of a protuberance 22 presented by the wall 14: and a wall 23 which, in the present example, is conveniently formed as a tongue struck up from the wall 1 L The walls 14 and 23 embrace the blade, as best shown in Fig. 5, while the protuberance 22 presents an obstruction to withdrawal of the blade from the groove. The wall 23 is resiliently related to the wall 14, it being in the form of a spring tongue (see Fig. 6) which is adapted to recede from the wall 14 when suflicient pressure is exerted against the blade in its own plane toward the protuberance 22, the

latter being rounded or beveled to permit the blade to ride over it. l Vlien the blade is in place this tongue resists lateral movement of the blade and accurately positions the latter with reference to the opposite wall 7 irrespective of the width of the groove with reference to the thickness of the blade. This results in accurate cutting of the loops and in uniform appearance of the work. When the blade is in place the tongue 23 constitutes an abutment which defines the position of the blade lengthwise in one direction (see Fig. 6) while the abutment 18 defines its position lengthwise in the opposite direction.

The pile wire and its knife are operated in a manner too well known to those skilled in When the blade becomes dull it may be removed and replaced by a sharp one with the greatest facility and when in place it is securely locked. against accidental disengagement from its holder.

Having thus described one embodiment of the invention but without limiting myself thereto what I claim and desire by Letters Patent to secure is: v p

1. A pile wire knife, comprising, in combination, a blade, a blade holder'presenting a groove in which said blade isreceived, and a filler also received in said groove between the inner edge of said blade and the bottom of said groove.

2. A pile wire knife comprising, in 00111- bination, a blade, a bladeholder presenting a groove in which saidblade is received, and afiller also received in said groove between the inner edge of said blade and the bottom of said groove, said filler presenting an abutment for one end of said blade.

8. A pile wire knife comprising, in com bination, a blade, a blade holder presenting a groove in which said blade is received, and a filler also received in said groove between the inner edge of said blade and thebottom of said groove, said filler presenting an abutment which overhangs one end of said blade.

4. A pile wire knife comprising, in combination, a blade, a blade holder presentin a groove in which said blade is received, and

a filler also received in said groove between,

the inner edge of said blade and the bottom of said groove, said filler presenting afulcrum onwhich said blade may be swung into and out of said groove.

A pile wire knife comprising, in combination, a blade, a blade holder presenting a groove in which said blade 18 received, and a filler also received in said groove between the inner edge of said blade and the bottom of said groove, said filler presenting an abutment which overhangs a portion of said blade and a fulcrum on" which said blade may be swung into and out of said groove. In testimony whereof, I have signed my name to this specification.

DEAN E. LoorIMAN. 

